/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneEntityManager.h
Efficiently mutate all entities that match a filter. Mutations can add or remove components from batches of entity data.
The number of entities that were mutated, or 0 if none were matched
int32 MutateConditional ( const [FEntityComponentFilter](API\Runtime\MovieScene\EntitySystem\FEntityComponentFilter) & Filter, const [IMovieSceneConditionalEntityMutation](API\Runtime\MovieScene\EntitySystem\IMovieSceneConditionalEntityMuta-) & Mutation, [EMutuallyInclusiveComponentType](API\Runtime\MovieScene\EntitySystem\UE__MovieScene__-) MutualTypes )